28747225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{449}}^1$

素因数の和:669

約数の個数: 24

約数和(自身を含む): 38669400

約数和(自身を除く): 9922175

約数列:

[1, 5, 13, 25, 65, 197, 325, 449, 985, 2245, 2561, 4925, 5837, 11225, 12805, 29185, 64025, 88453, 145925, 442265, 1149889, 2211325, 5749445, 28747225]

約数ペア:

[(1, 28747225), (5, 5749445), (13, 2211325), (25, 1149889), (65, 442265), (197, 145925), (325, 88453), (449, 64025), (985, 29185), (2245, 12805), (2561, 11225), (4925, 5837)]